Windshield wiper



Feb. 17,' 1931". J.- BRNSTEIN WINDSHIELD 'WIPER Filed Aug. s, 1927 4 Sheets-Sheet 1 4 Sheets-Sheet 2 (l A. y

J. BoRNsTElN WINDSHIELD wIPER Filed Aug. 3, 1927 Feb-1 7, 1931.

Feb, 17 ,1931. J. BoRNsTElN wINDsHIELD WIPER lFiled Aug. 3, 1927 Y 35.. motor whereby each nut or Wiper carrier trav- A time the Wiper Will tend to stick and Will not Patented Fei.Y 17, 1931 UNir trastii figc A TION OF MASSACHUSETTS or BOSTON, MASSACHUSETTS, A coRPoRA- WIN DSHIELD WIPER Y Application ied August 31927. serial No. 210,402.

This invention lrelates to a Windshield Wiper of the rectilinear type.

It has been proposed `to operate a vviper" longitudinally of a Windshield by a screw and nut but dueto the fact that a screw of great length is requiredto provide for a rectilinear vmotion of the Wiper across the entire length Y of the Windshield, it is dililcult to furnish the necessary bearingrsuraces to prevent buck-,I

ling, slap, or vibration of the screw so that in operate vvitho'ut noise. v l

An obgect of the present invention is the provision of a mechanism `for causing a rec'- tilinear motion ot Wipers in which a plurality .of nuts are moved at equal speeds by a screw and in complementary relation so'that all vibration and distortion of the screw is prevented. Y f

Another object` ofthe invention is the prov vision of a Windshield Wiper in which a plurality of squeegees are moved in a rectilinear motion across a Windshield by a screw and a' plurality of nuts with the nuts serving as bearings at Vpoints which are equally .spaced` i' V,at all times sovthat springing or vibration of lao f eachbeingadapted'at theend of its outward the screw iseliminated.

A. further object of the invention is the provision'of a Windshield Wiper in Whicha plu-j rality of Wiper carriers in the form of nuts are moved in cooperative relation in a channel,

movement of travel to actuate a switch arm controlling a switch for reversing an electricl snowstorm since tWo areas 'of the Windshield in close proximity are always the process of .being cleaned. f f A still Jfurther object of the invention is the provision of automatically vand rectilinearly operated squeegees moving in cooperative re` s lation across closely associatediields of vision ot a Windshield and in Which manual means are operatively connected With the -actuating VYinstrumentality for thefsqueegees 'so that when the automatic means becomedineective the manual means may be brouglit'into play.

Other' objects and advantages of the invention will be fully understood from the follo-W- ingdescription and claim when the same are read in connectioiivvitli the dravvings, accompanying and forming'part of my invention; in which: i ln the drawings: I Fg. l's a vievv in elevation of a Windshield wiper constructed according to the principles ot my invention.y C l F ig. 2 is a horizontalsection of the Wiper shovvn'in Fig. l. Y i

F along the line 3-3 of Fig. 2.

Fig. is a transverse vertical sectiontaken l along theV linea-4f of Fig. 2.

ig. Sis a transverse-vertical section takenV Fig. 5 is a yfragmentaryvertical v'lo'iigi-.

tudinal sectional'vievv along the line 6 6 of Fig. 5. .2

illustrating a modifie; 7

Fig. t is arragmentaryvievv in'elevation of n the Wiper arm.

elevationoi' lthe modified F ig. l0 is a vertical Sectioiiof the betiveenthe motor shaft `and screvv. v F ig. ll is a horizontal section ofa modiied 1 iorm of ynut or Wiper carrier'having vairinternally threaded metal sleeve'- land a-'nonmetallic guiding block. i

Fig. 8 is-a horizontal section etwa nutvorl A l form of Windshieldivipe'r sliovvnlin Fig.' 5. connectionlf...

Referring more particularly to.tliekc'lraw-A ings, `l() designates a housing for aniotorillV which has sliattlQ mounted inrbearings ,'13 and 14; Y. This Vslia'ftlias connectiony at' 15 ivith a screw l'eifteiiding longitudinally ota housing'l?. rlfhis housing isforr'ned integra lly orfmay be connected in any ap-j, proved manner with thef housing 10. f

. The 'screvv i6 has "a bearing at 18 at one end ot the housing '17. Attlie Vouter end ot the screv'v'is mounted a vgear 2Q meshing with `end and a bearinglt)V formed at the outer `a geark 21tlie last mentioned gearbeing Y rigid Witha shaftl 22 and 'adapt-ed tobe man- I uallyopera-ted by a crank 23.v

A pa-irlof spaced nuts 24 and`25 .have ay centrally threaded passage meshing With the "fff screw 16V so that when the screws are re- Vvolved by the motor 11, the nuts will be moved longitudinally and in predetermined spaced relation within the housingr 17. if

spacing block 26 is secured to a nut andprojects through a slot 27 formed longitudinally in one side of the 'housing 17. Y 2S'is secured to the block 26 and the nut 24 and is provided with a wiper Varm 29 which may be adjusted relative to'tlie arm 2S by means of la screw 30 and thumb nut`3l. The threaded passages in the nuts may be located eccentrically instead of centrally if desired.

lThe nut 5 carries an arm 32 exteriorly of the housing 17 and the block 26 rides within the slot 27 spacing the arni32 slightly from the inner face of the housing 17. Both of the nuts are maintained against rotation by means of oppositely disposed V-shaped depressions 33 slidable in grooves 34 in the nuts. A

LA rod 40 is slidably mounted within a groove 41 of the housing 17 and has depending arms 42 and 43 vprojecting towards the 4screw 16 and in the nath of the movino' nuts 24 and 25.' A spring'44carried by the nut 24 is adapted to engage the arm 43 and a coilv sgrin'g`45 carriedby the nut 25 and projecting outwardly therefrom is adapted to engage the arm 42.

diere the housing 17 is connected to the motor housing 10, an extension 46 is provided forming a chamber`47 into which projects a contact member 48-'and isfmovable therein. p4- secondfcontact member VV49 is carried by the housing" 17 and extends into the path of the movable contact 4S. Said contact is disposed within a slot 50 in the rear wall of the housing 18 where said vwall forms the inner wall of the extension 46.

It will-be noted that the inner section 51 of the housing 17 is cut away at ,52 to perinit sliding A,of the arm' 43, while the sam-e Asection is cut away'at 53 `to permit sliding of the armV 42. v .v Y Figures 5 to 9 inclusive disclose a modi- I fied form of the nut andhousing. In this case the nut 60 is formed of any suitable material which may be non-metallic, if pre- `ferred f r aiding in eliminating noise.

The opposite'ends of the -nut are reduced and threaded as shown at 61 to receive collars 62 having anges 63 which abut the shoulders formed by the reduction. of the opposite.Y ends of the nut. A washer 64 is threaded on to the' reduced end Y61 and a nut 65 is threaded on to the reduced end" and is forced into engagementwith the washer 64. The nut has a central passage 66 which is internally threaded and engages the threads of a screw 16a. l f j Therhousing 17 a may be of any shape9 but in this case prefer to make the saniejcylin- An arm 69 forming a lateral extension of the nut 60.

Secured to the outer projecting end of the lug 69 is` an arm 70 which is perforated to receive a screw 71 and a lock nut 7 2 secures the viper 7 3 to the arm 70. The portion 74 of the-wiper arm is enlarged as'` shown in Figure 7 in order to provide sufficient frictional surface to maintain the arm against 'movement when the nut 72 has been properly adjusted. The wiper arm 73 carries a rub-- ber member 75 which is moved in' close conn tact with the surface of 'the'windshield The contact members 43 and 49 are similar inall respects to the Contact members shown in Figure'2 and the member 48 is carried by the reciprocatingrod 40 which has the depending arms 42 and 43 adapted to be vengaged bythe Vcoil springs 44 or 45 proj ecting outwardly from a nut 60 and 60a.

A worm` on a. shaft 81 is adapted to be rotated by a crank 82 and since itmeshes with a worm gear 33, it will cause rotation of said worm gear the screw 16a. Y .f

A. modified form of the nut is shown in Figure 11 in which a body member90is formed i of non-metallic material which will Vaid in eliminating noise and which has a central passage 91 torecei-ve asleeve92 wliich'is retained against rotation by means of vnuts 93 threaded on to the opposite endsvof the sleeve and forced intoeiigagement with the oppositeends of the body member 90. The sleeve 92ais internally threaded and meshes with' the screw 16a sorthat rotation of the screw willcause rectilinear motion of the body member 90 when the nut is held against rotation. To this nut is secured the usual wiper arms having lugs, as has been previ-ll ouslyexplained, projecting through the elongated slot 27 in the housing 17. rReferring more particularly to Figure 10, it will be seen that an enlargeddetail of the connections between the motor shaft 12 and the screw/'16a is disclosed. The outer'end of the screw: 16 is pinnedat 100m a socket of-a` rotatable member 101. This'member'has a projection 102 inserted through an openingl 103 of an' auxiliary housing 104. .The projection 102hasa soclfettorec-eive a pin 105 which secures the projection to the shaft 12. The operation of my device is as follows: When the motor 11 is energizedand Vrotated, it will cause rotation of the'screw 16. or 16a in one direction. At this time, the

nuts 24 and 25 or 160Vand 60a are moved in a rectilinear motion towards the right until the coilA spring contacts with the lug or arm Y 42. When the pressure overcomes the tension of the spring 45 said lug is moved to the right, forcing -t-herod 40 4in the same direci tion and causing. the contact 48to be moved away from the contact 49, thereby reversing .the circuit to the motor, which turn re-V verses its rotation and thereby causing a re-V verserevolution ofthe screw The-nuts 24 and 25or 60 and 60a are moved towards the leftand when the spring 44 iscompressed sutl'iciently to force the lug 43 to the left, said i. lug is moved and the contact 48 is shifted to contact engagement with the member 49. t this time the current is reversed and the motor ,is reversely operated for causing theV screw to be revolved in the opposite ,direc` tion whence the nuts are moved to the opposite end of tlie housing, and thisalternating movement continues as long as the motor is energized.

It will be seen by this construction that theV spaced nuts provide movable bearings at all times, and will prevent vibration or slap of the` screw, while at the same time causing one wiper to cover half the ground that would have been covered by a single wiper. Furthermore, the Vuse of non-metallic nuts .does

not only aid in the elimination ot noise, but

also prevents the setting up of vibrations in the screw during rotation.

If at any time it lis desired to move the wiper arms out of direct line of vision with the occupants of the car, it is only necessary Vto release the nuts 317er 7 2, whence the wiper rod 40. As the rod is moved in opposite directionsl the member 121 is oscillated so that its lower end will contact'with either the switch blade 124 or 125 in the casing 46.

Having thus described myinvention, what I claim as new is:

na'windsliield wiper, a housing, a drivi jing screw in the housing, a plurality of spaced squeegee carriersin the housing and having openings through which Qthescrew is threaded to move the -squeegee carriers in unison between thecentral and end portions ofY the screw, said squeegee carriers being closely embraced by said housing and thereby forming constantly spaced bearings for the screw,

each of which alternately approaches andsupports the central portion of the screw simultaneously with the recession of the other I bearing from such supporting position.

In testimony whereof I affix my signature. JOSEPH BORNSTEIN. 

